Syringe



E. A. JONES Feb. 23 19426.

SYRINGE c raceteam. 23, 1926.

i Be ivknown that I,.EDMUND s... UNITED STATES :epMUNn A. iroNEs, or WEST PATENT orifice,

nnnronn MASSACHUSETTS.

sYnINGn. P

Applicationled August 30, 1924. "Serial No. 735,182.

T o t may concerm A. JONES, a

' citizen of the United States, and a resident of West `Medford,' county of Middlesex, State 'of Massachusetts, have invented an improvement in Syringes, of which the following description, in connection withthe accompanying drawings, is a specification, like characters on the ldrawings representing nke parts. i i

This invention relates to a novel and im- 'proved syringe of the class in which the Huid to be injected is contained in a tube which4 can be inserted into a holder from which it can be removed after the injection' has been made. lThe invention will be best understood Tby reference to the following description when taken. in connection with the accompanying drawings of one specifi@ embodiment thereof, whileits scope will be more particularly pointed out inthe ap-y pended claims.

Inethe drawings: Fig. 1 is a sideelevation, partly in section,

'of a syringe embodying the invention;

Fig. 2 'is a` sectional viewonan enlarged Scale online 2-2 of Fig. v1, illustrating the first Stepvor movement in loading the tube xnto'the holder; 4 y I Fig. 3 is a sectional View similar to Fig. i?

illustrating the second step or movement in loading the tube into the holder; and

, bodiment of the invention which is selected 4 is a sectional view similar to Figs. 3,- illustrating the completely assembled syringe, ready for'use, this view also illustrating in sectionvl the separate needles, one for penetrating the flesh and the other :for netrating the soft closure of the for- 'war end of the'tube. Referring to the drawings and to the emfor'exe'mplication, thev syringe comprises a frame or `holder 5 presenting two lateral .4 openings 6, through either ofu whicha capsule comprising a glass tube 7 may be introduced into and withdrawn from the holder,

"while the other of said openings serves to iso admit the users finger or fingers, when manipulat'in the capsule. v'Thevcapsule pre-l sents at its orwardiend aclosure `such as a- 1 rubber plug'8 having a head9, which prevents the 4plug from sliding` to'o far into the tube. This tplug is received in arecess 10 and is seate endwise against an abutment llpresented by the holder, and if desired, Aa

washer 12 may be interposed between said plug and said abutment.

The rear end of the capsule is retained in andcentered by the wallsof a recess 13 presented by a sleeve 14:, forward movement ofy which is limited by an appropriate stop, herein shoulders 15 (see Fig. 1) presented by the sides of the frame. The sleeve is intended to retain the capsule against lateral 5 movementbut is not intended to rest endwlse agalnst 'the capsule. However, 'as capsules are sometlmesv too long, I may provide a soft washer 16, of tin for example, to pre-A vent injury of the glass tube. A spring 17,

Aencircling the sleeve and resting `at one end against an' abutment 18 presented by the sleeve' .andl at its other end against an abutment 19 presented by a vcap 20 threaded onto a rearwardly extending boss 21 presented by the frame, urges the sleeve in a forward directionagainst the shoulders 15 and thus retains the capsule` in. vits proper position. rlhe sleeve is guided by the frame and by the cap. Rearward movement ofthesleeve to the position shown in Fig. 3 releases the rear end of the tube and permits the latter tc be swung laterally. and to be vwithdrawn through the opening 6 in the holder 5.

.In the present embodiment this rearward movement t is accomplished by rearward' movement of` a plunger 22 having a head 23, which causes rearward movement of the plunger to be accompaniedrby rearward movement of the sleeve in opposition tothe yielding resistance presented bythe spring.

The plunger is provided 4with a handle 24, while the frame iis provided withv a handle 25, the latter beine' mounted on and about the boss 21 and, eing retained in place thereon by a collar 26 threaded onto said boss.

" The headof the plunger is adapted to holder and "is/thrust forward by the hand the rubber ca 8, which closes the forwar end of the tu e, is punctured by a hollow needle 28.- This needle is mounted for con-I es 'l When the capsule is introduced into the l venient application to and removal from the frame by providing the needle with a laterally projecting collar 29, herein having a frusto-conical form and being seated against a correspondingly Jformed seat 30 presented by the forward end of the frame, which also presentsa recess 31 into which a needle holder 32 is threaded. A washer 33, which may be made of soft metal such as tin, is interposed between the collar 29 and a seat 34 presented by the inner end of the needle holder. By this means the needle is securely held in place and leakage past the jointis prevented, while still'permitting removal of the needle by simply unscrewing the needle holder, and withdrawing the needle in a forward direction. The forward end of the needle is received in an axial -bore 35 presented by the needle holder.

A separate and distinct, flesh-penetrating, hollow needle 36 is mounted in its own separate and distinct needle holder 37 which is screwedonto a reduced, 'threaded shank 38 presented by the needle holder 32, while a washer 39, which may be of soft metal such as tin, interposed between the inner end of the needle holder 37 and a shoulder 40 presented by the needle holder 32 prevents leak-4 age at this joint. This needle holder, like the former, is provided with an axial bore 41 which communicates with that of the former, for the flow ofthe fluid from the capsule into the flesh. Thus it should be evident thateither needle may be replaced without replacement of the other.

The general operation of the syringe should be evident from the foregoing without further description, but will be briefly outlined. To load the syringe, a fresh capsule is introduced through one of the lateral openings into the holder and is pressed "forward to cause the penetration of the closure 8 and to bring the forward end of the capsule against the abutment as in Fig. 2. The sleeve is then retracted rearwardly by pulling the plunger rearwardly to the position shown in Fig. 3. The rear end of the capsule can now be swung into place as in Fig. 3 and the plunger then released, whereupon the spring forces the sleeve forward against the stop shoulders 15. The walls of the recess 13 now center and retain the rear end of the capsule against lateral movement. use and its contents may ,be ex elled by pushing the plunger forward. It 1s evident that kthe operation, of `the syringe is simplicity itself, as but two easily made move- -ments are necessary to `load and prepare it for use. The construction is such that the parts can be sterilized readily.

Having thus described one embodiment of the invention, but withoutA limitig myself thereto, what I- claim and by Letters Patent desire to secure is: f

The syringe is then ready for 1. In a syringe, the combination of a krigid frame'presenting a lateral opening, a

guide adjacent its rear end and an abutment adjacent its front en'd, a tube having one end seated endwise against said abutment and removable ylaterally through said opening, a rearwardly movable retainer having a'recess to receive the other end of said tube, said retainer being longitudinally slidable in said guide, and a plunger for expelling the contents of said tube, and for retracting said retainer to permit the insertion and removal of said tube.

2. In a syringe, the combination of a rigid frame presenting a lateral opening, a guide adjacent'its rear end and an abutment adjacent its front end, a tube having one end seated endwise against said abutment and removable laterally through said opening, a rearwardlyremovable retainer having walls to embrace the other end of said tube, said retainer being longitudinally slidable in said guide, a spring for urging'said retainer :torward, and a plunger for expelling the con- 'tents of said tube, and for retracting said retainer to permit the insertion and removal of said tube.

3. In a syringe, the combination ofa frame presenting a lateral opening and an abutment, 'a tube having one end seated endwise 95 against said abutment and removable laterally through said opening, a rearwardly lmovable retainery for the other end of said tube, and a plunger for expelling the c011- tents of said tube, said plunger carrying lo@ means for retracting said retainer.

4. In a syringe, the combination of a frame presenting a lateral opening, a guide adja-` cent its rear end and an abutment adjacent its front end, a tube having one end seated 105 V-of said tube, said retainer being longitudinally slidable in said guide, a spring normally'urging said retainer endwise toward said tube, another guide for said retainer presenting an abutment for the rear end of said spring and removably mounted on the rear end of said Jframe, and a plunger for expelling the contents of said tube.

5. In a syringe, the combination of a frame presenting a lateral opening and an abutment, a tube having one end seated4 endwise against said abutment and removable laterally through said opening, a movable retainer for the other end of said tube, a spring normally urging said retainer toward said tube, and a plunger for expelling the contents of said tube, said plunger and said retainer having cooperating means to cause retraction of said plunger to be accomf panied by retraction of said retainer against t-h'eresistance presented by said spring.

6. In `a syringe, the combination of a 13@ holder presenting a lateral opening and an abutment, a tube having one end seated endwise against said abutment and removable laterally through said opening, an end- Wise movable sleeve presenting a recess which receives the other end of said tube, a spring normally urging said sleeve end- Wise toward said tube,.and a plunger Jfor` expelling the contents of said tube, Said plunger extending through said sleeve and having means cooperating therewith to cause retraction of said plunger to be accompanied by retraction of said Sleeve against the yielding resistance presented by said spring.

`7. In a syringe, the combination of a holder presenting a lateral opening andl an abutment, a tube having one end seated endried by said holder, an endwise 'movableV sleeve guided by said guide and presenting l tube, a spring having one end seated against an abutment presented by. said guide and its other Aend `seated against. an' abutment presented by said sleeve and urging the latter endwise toward said tube, and a plunger received in said sleeve andhaving means cooperating therewith' to cause retraction of said plunger-to be accompanied by lretracva lateral retainer for the other end of said tionA of said sleeve against the, yiel'ding resistance presented bysaid spring.

In testimony whereof, I have signed my Y l name to this specification.4

EDMUND A. ONES. 

